Open Court1910The mutation theory : experiments and observations on the origin of species in the vegetable kingdom / by Hugo de Vries ; translated by J.B. Farmer and A.D. Darbishire
v. 2
Open Court , Kegan Paul, Trench, Trübner1909The mutation theory : experiments and observations on the origin of species in the vegetable kingdom / by Hugo de Vries ; translated by J.B. Farmer and A.D. Darbishire
v. 1